x86-64 NASM Linux ATM Simulation System

A low-level ATM simulation software built in 64-bit Assembly (NASM) utilizing raw Linux system calls (sys_read, sys_write, sys_exit) without C standard library (libc) overhead.

---

Key Features

• Security: PIN authentication with a 3-attempt lockout system.
• Colorized Terminal UI: Uses ANSI escape sequences for dynamic visual feedback.
• Transaction Safety: Enforces per-transaction limits ($500) and prevents negative/invalid input logic.
• Zero Overhead: Pure assembly code direct-linked using ld.

---

Build & Run Instructions

Prerequisites

Ensure nasm and build-essential are installed on your Linux / WSL environment:

sudo apt update && sudo apt install nasm build-essential -y